Inside the polling booths, they will choose only one ballot paper. They will not be asked to indicate their preferred candidates on the party ticket by marking a cross (a "+", not an "X") next to their names, as is customary, as candidates will be selected according to party lists determinded by the results of the May 6 election.

Another dozen seats are allocated at state level, on the basis of the nationwide share of the vote of the parties that cross the three percent threshold necessary to enter parliament. The twelve deputies elected in this way are drawn from party lists.

The first-past-the-post party will receive the election’s biggest prize – a 50-seat bonus.